Hi,
(TL:dr at bottom.)
Monday, 12/28/15, upon returning after the holiday, our internet connection (via Frontier ADSL) was not working. The Netgear N600 unit had all the lights working, including sync and internet. The lan inside the building worked, but we had no connection to the outside. Called Frontier, they said the line looked OK, so they sent out a tech the next morning (12/29).
The tech confirmed that the line was good. He said Frontier probably pushed some changes to modem configurations (?) and that messed up our unit. So, he set up a new Netgear 7550 B90-755046-15 unit and said "OK, you have internet."
But we didn't. Our lan is Class A (10.0.0.0, subnet mask 255.255.255.0) but the 7550 unit has a private lan ip of 192.168.1.254. We (the tech and I) tried to change the private lan ip to 10.0.0.xxx (and the DHCP start and end) to make it compatible with our lan, but we get the message "Private Start IP Address is in the Modem Restricted Subnet." The tech said this was now beyond his area of responsibility. At this point, I had to move on to more pressing matters.
Note that our lan has a couple dozen computers, server, and a number of laboratory instruments with fixed IP addresses, so changing everything to Class C could be a problem.
This morning, 12/30, at 7:30 am I began my calls with tech support at 800-239-4430. The first person I spoke with (S) told me I had to pay them before they could help. This seems unethical; since they broke the service, why should I pay them to fix it? After ending this call, I tried again.
The second rep (E) was more helpful, and he spent about 45 minutes with me trying to figure this out. Then, we were disconnected. I waited about 5 minutes, and called the above number again. The third rep (J) was also friendly, and tried to help, and then put me on hold. He came back and said he found rep E, who said he tried calling me back but got a busy signal (??, we have a phone network, this should not happen.) So, rep J asks for a number where E can reach me, and says E will call as soon as he can. This was at about 9 am, it is now 3 pm, no call.
Someone who works here knows someone else who works at Frontier. Phone calls were made. I get a call from P, who listens to the problem and says he can't fix it but will have someone else call me.
It is now 3pm, no call.
Please forgive the rambling story, I need to vent. But more importantly, I need to change the private lan ip address on the Netgear 7550 modem/router.
TL;dr Need to change the private lan IP address on a Netgear 7550, provided by Frontier, from a Class C to a Class A range. Attempts result in error message "Private Start IP Address is in the Modem Restricted Subnet."
Thanks for letting me vent, and thanks for any ideas.
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